Diamond-polishing dop.



'No. 63!,562. Patented Aug. 22, I899.

H. COOPER. DIAMOND POLISHING DOP.

(Application filed Aug. 10, 1898.\ (No Model.) 2 Sheets-Sheet l.

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N0. 613L562. Patented Aug. 22, I899.

- H. COOPER.

DIAMOND PULlSHlNG DOP.

(Application filed Aug. 10, 189B.\ (No Model.) 2 Sheets-Sheei 2.

WITNESSES INVENTOI? A TTORNE Y UNITED STATES;

PATENT OFFICE.

HERBERT COOPER, OF JERSEY CITY, NEWV JERSEY.

DIAMOND-POLISHING DOP.

SPECIFICATION forming part of Letters Patent No. 631,562, dated August252, 1899.

Application filed August 10, 1898. Serial No. 688,262. (No model.)

To all whom it may concern:

Be it known that I, HERBERT COOPER, a citizen of the United States,residing at' J ersey City, county of Hudson, and State of New Jersey,have invented new and useful In1- provements in Diamond-Polishing Dops,of

which the following is a specification.

The object of my invention is to provide new and useful improvements indiamondpolishing dops, to the end that stones of varying sizes may bereadily adjusted in an operative central position, and whereby the stonecan be adjusted to various angles relatively to the polishing-surfaceand held firmly in such positions.

The invention consists in a dop comprising a head, a pair of jawsmovable toward and from each other, a supplemental jaw movable at anangle to the other jaws, which jaws are adapted to hold a stone to bepolished, and means for supporting said head.

The invention further consists in a dop comprising a head, a pair ofjaws movable toward and from each other, a supplemental jaw movable atan angle to the other jaws, which jaws are adapted to hold a stone to bepolished, a stem to support said head, and means for adjusting said headon a curve across the plane of the longitudinal axis of said stem.

The invention also consists in a dop comprising a head means carriedthereby for holding a stone to be p0lished',said head having a curvedgroove, a block located in said groove, means for detachably securingsaid block to said head, and a stem adapted to be secured to said block.

The invention also consists in a diamondpolishing dop comprising a headhaving two bores, one at right angles to the other, a right and leftthreaded screw or worm in one bore, stone-holding jaws projecting fromsaid bore and threaded on said screw or worm, means tails of improvementand the combinations of parts that will be more fully hereinafter setforth and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming parthereof, wherein-- Figure 1 is a side elevation of a dop embodying myinvention. Fig. 2 is a View at right angles thereto, looking from theright. Fig. 3 is a vertical section of Fig. 1, showing the head in adifferent position of adjustment. Fig. 4 is a side view looking from aposition diametrically opposite that shown in Fig. 2. Fig. 5 is asection on the line 5 5 inFig. 1, looking in the direction of thearrows. Fig. 6 is a detail view, enlarged, of the stone-holding jawsthat operate in conjunction. Fig. 7 is a detail perspective view of oneof the jaws. Fig. 8 is an under plan view of the dop. Fig. 9 is an endview of a dop embodying a modi fication; Fig. 10 is an inverted planview thereof. Fig. 11 is a top plan view thereof. Fig. 12 is a centralsection on the line 11 11 of Fig. 11, and Fig. 13 is a detail view ofthe sliding jaw of Fig. 9.

Similar numerals of reference indicate corresponding parts in theseveral views.

In the accompanying drawings, 1 indicates a head, which is shown in theform of a block and provided near one end with a bore 2, that opensthrough both sides of the head, and 3 is a bore that opens into the bore2, extends at right angles thereto, and opens through one end of thehead. (See Fig. 3.) Within the bore 2 is located a right and leftthreaded worm or screw 4, whose ends (see Figs. 1, 2, 3, 4, and 5) bothproject beyond the dop-head, and one wall of the head in line with thebore 2 is slotted to form an opening into said bore, as at 5. 1 p

6 is a thumb-piece or handle secured upon the screw or worm 4, by whichthe same may be rotated, and 7 is a nut threaded upon said screw or wormat the opposite end to thumbpiece 6, so that when screwed up against theside of the head 1 the screw or worm 4twill be locked rigidly inposition.

Sis a pin or stop shown carried by head 1 and located in annular groove9 in the screw or worm shaft 4 to keep the same from moving cndwise.

10 are a pair of jaws adapted to grasp a stone 11 between them, whichjaws have threaded bores adapted to receive the threads upon the worm orshaft 4, the inner ends of said jaws being adapted to fitwithin the bore2 in head 1 and to travel toward and from each other therein,which jawsproject through the slot 5 in said head. By the arrangement shown whenthe shaft 4 is rotated back or forth the jaws 10 will be caused totravel toward and from each other in unison and in equal degrees ofmovement. At their outer ends the jaws 10 have recesses or sockets 10,adapted to receive the edges of the stone 11 that is to be polished.

\Vithin the bore 3 is located a threaded shaft or screw 12, that isadapted to rotate, but is prevented from having endwise movement bymeans of a groove 13, that receives a pin 14, projecting from head 1into said groove. (See Figs. 1 and 3.) It willbe seen that the materialof the screw or threaded shaft 12 at the sides of the groove 13 is of agreater diameter than the threaded portion of the screw, thus formingannular shoulders that fit within the bore 3 and serve as bearings forsaid screw or threaded shaft. (See Fig. 3.) Upon the outer end of screwor threaded shaft 12 is seen red a thumb-piece or handle 15, by whichsaid shaft can be rotated, and between said thumb-piece and the groove13 are screw-threads 12, upon which a nut 16, preferably a wing-nut, isadapted to work, by which the screw or threaded shaft 12 can be lockedin any desired position by screwing the nut 16 firmly against the head1.

17 is a jaw that is adapted to coact with the jaws 10 in holding thestone 11, the inner end or head 17 of said jaw 17 having a threaded boreto receive the threads upon the inner portion of screw or threaded shaft12, the head 17 of jaw 17 being located in the bore 3 and adapted totravel therein, the jaw 17 projecting through a slot in the head 1, thatopens into said bore. At its outer end the jaw 17 may have one or morerecesses or sockets 17 to engage the edge of a stone to coact with thesockets 10 of jaws 10 in holding said stone.

From the foregoing it will be understood that when it is desired to holda stone the jaws 10 are spread apart sufficiently to receive the stonebetween them and are then adjusted toward each other so as to grasp thestone, and the jaw 17 is set up against the edge of the stone at rightangles to the points where the jaws 1O engage the stone, by which meansstones of varying sizes can be readily connected to the head 1, and bymeans of the thumb-pieces 7 and 16 the jaws can be held locked, so thatthere will be no danger of the stone slipping from between the jaws.

The dop-head above described maybe supported in any suitable manner, sothat the stone can be presented to the polishing-surface. It ispreferred, however, that the head 1 be so supported that it can bereadily adjusted in various positions relatively to thepolishing-surface. For these purposes I have shown the followingarrangem ent: In the side of the head 1, opposite the jaws 10 and 11, isan arcuate groove 18, and the outer surface of the head at this part iscorrespondingly curved at 19, the side walls of the groove 18 beingshown undercut or beveled outwardly, as at 20. (See Figs. 2 and 4.)\Vithin the groove 18 is ablock 21, that has outwardlybeveled sides tocorrespond with the sides 20 of groove 18, and the under surface of saidblock is shown'curved at 21" to rest upon the curved bottom of groove18. (See Fig. 3.) From the block 21 extendsa post 22, provided withexternal serews-threads 23, upon which a thumb-nut 24 is adapted to workto jam the block 21 in the groove 18, and by preference between thecurved edge 19 of head 1 and the thumb-nut 24 is located a washer 25,that has a bore to receive the post 22, the thumbnut 24 being adapted toimpinge against the washer 25 to force the latter against head 1. Theunder surface of the washer 25 is curved to correspond to the curve 19of the head 1. The end of block 21 that extends toward the thumb-nut 16is preferably cut away at 21" to enable the block 21 to be pushed wellaround through the groove 18 toward that end of the head 1. (See Fig.3.) By the means described when the position of stone 11, that issecured to head 1, is to be altered the thumb-nut 24 is screwed back,which loosens block 21 from its groove, whereby the head 1 can be swungor moved laterally along said block to the position desired, and thenthe thumb-n ut 24 can be screwed down firmly again to hold the parts inthis position.

26 is a stem to be carried by any suitable support and arranged to beconnected with the post 22. I have shown the parts 22 26 detachablyconnected, for which purpose the post 22 has a central bore 22 toreceive stem 26, and the material of said post is slit longitudinally inone or more places into said bore, as shown by dotted lines at 22 inFig. 3, so that the material of said post can be squeezed or pressedagainst said stem 26.

27 is a nut, preferablya wing-nut, threaded on the threads 23 of post22, the post being slightly tapered outwardly, whereby as the nut 27 isscrewed upon the same the stem 26 can be firmly secured to the post 22.This arrangement permits ready attachment or detachment of the post 22to and from the stem 26.

In the modifications shown in Figs. 8 to 12, inclusive, the thumb-nut 7is on the same end of the shaft or screw 4 as the thumb-piece 6, butbetween the latter and the head 1, so that when the jaws 10 are adjustedto the proper position the nut 7 can be screwed against said head. Insaid figures also the screw 12 is IIO dispensed with, and the head ofthe jaw 17 is located in the bore 3, as in Fig. 3; but back pressureagainst said jaw is resisted by means of one or more cars 17, carried bysaid jaw, that are adapted to engage teeth l on the surface of head 1 atthe side of the slot 3*, that leads to bore 3. (See Fig. 10.) Bypreference there are two such ears 17 and two rows of teeth P-one row oneach side of slot 3*. The teeth 1 are cut so as to project toward thestone to be held, and the arrangement is such that the jaw 17 can bereadily pushed toward the jaws 10; but when the outer end of jaw 17meets the resistance of the stone 11 it will be tilted backwardlysomewhat, so as to cause its ears 17 to en gage the teeth 1*, and thusthe jaw 17 is prevented from sliding back. 28 is a pin carried by thehead 1 and extending across the path of jaw 17 in bore 3 to prevent saidjaw from slipping out of said bore. With the arrangement above describedthe stone is held between the jaws 10 17 by placing the stone inposition, screwing the jaws 10 against said stone, and pushing the jaws17 up against the stone, whereupon the ears 17 and teeth 1 hold the jaw17 in such position.

I do not limit my invention .to the precise details of constructionshown and described, as they may be varied without departing from thespirit thereof.

Having now described my invention, what I claim is 1. A dop comprising ahead, a pair of jaws having movement of translation toward and from eachother, a supplemental jaw having movement of translation independentlyof and at an angle to the other jaws, said jaws being adapted to hold astone, and means for supporting said head, substantially as described.

2. A dop comprising a head, a pair of jaws movable toward and from eachother, a sup plemental jaw movable at an angle to the other jaws, meansfor moving said jaw independently of the first-mentioned jaws, said jawsbeing adapted to hold a stone, a stem to support said head, and meansfor adjusting said head on a curve across the plane of the longitudinalaxis of said stem, substantially as described.

3. A dop comprising a head, a right and left threaded screw carriedthereby, jaws adapted to be operated by said threads to move toward andfrom each other, and a supplemental jaw carried by said head adapted tocoact with the first-mentioned jaws in holding a stone, and means forsupporting said head, substantially as described.

4. A dop comprising a head, a right and left threaded screw carriedthereby, jaws adapted to be operated by said threads to move toward andfrom each other, a screw carried by said head at an angle to thefirst-mentioned screw, a jaw adapted to be moved by said screw and tocoact with the first-mentioned jaws, and means for supporting said head,substantially as described.

5. A dop comprising a head having two bores, one extending at an angleto the other, a right and left threaded screw located in one bore, jawsadapted to be operated by said screw to move toward and from each other,the inner ends of said jaws being located'in said bore and projectingthrough a slot in said head, a screw located in the other bore, a jaw tobe operated by said screwand having its inner end located in said bore,and means for supporting said head, substantially as described.

6. A dop comprising a head having two bores, one extending at an angleto the other, a right and left threaded screw located in one bore, jawsadapted to be operated by said screw to move toward and from each other,the inner ends of said jaws being located in said bore and projectingthrough a slot in said head, a screw located in the other bore, a jaw tobe operated by said screw and having its inner end located in said bore,means for locking said screws in the operative position, and means forsupporting said head, substantially as described.

7. A dop comprising a head having two bores, one located at an angle tothe other, a right and left threaded screw located in one bore, means toprevent endwise movement of said screw, a handle or thumb-piece for saidscrew, a nut threaded on said screw adapted to hold the same firmly,jaws adapted to be operated by said screw to move toward and from eachother, a screw located in the other bore, said screw having athumb-piece, a nut to hold said screw firmly in a set position, a jawadapted to be operated by said screw and to coact with thefirst-mentioned jaws, and means for supporting said head, substantiallyas described.

8. A dop comprising a head having two bores one extending at an angle tothe other, a right and left threaded screw located in one bore andhaving a groove, a pin carried by said head to enter said groove, meansfor operating and for locking said screw, a pair of jaws adapted to beoperated by said screw to move toward and from each other, a screwlocatedin the other bore and having a groove, a pin carried by the headto enter said groove, means for operating and for locking said screw, ajaw adapted to be operated by said screw and to coact with thefirst-mentioned jaws, and means for supporting said head, substantiallyas described.

9. A dop comprising a head having a pair of bores, one extending at anangle to the other, a screw located in one'bore, jaws adapted to beoperated by said screw to move toward and from each other, a screwlocated in the other bore and having annular flanges forminga groovebetween them, which flanges have a bearing in said bore, means foroperating and locking said screw, and a jaw to IIO be operated by saidscrew and to coact with the first-mentioned jaws, substantially asdescribed.

10. In a dop the combination of a head, a plurality of jaws, two ofwhich are adapted to move toward and from each other in the same plane,means for operating said jaws, the other jaw being adapted to move at anangle to the movement of the first-mentioned jaws, means for operatingsaid jaw independently of the other two jaws, means for holding saidjaws in a set position, and a support for said head, substantially asdescribed.

11. In a dop the combination of a head, a plurality of jaws, and meansfor operating said jaws to grasp a stone between them, thestone-gripping ends of said jaws having recesses to receive the edges ofthe stone, substantially as described.

12. A dop comprising a head, means carried thereby for holding a stoneto be polished, said head having acurved groove, a blocklocated in saidgroove, said block and groove having interlocking edges, means fordrawing the edges of said block against the edges of said groove to lockthe block in the groove, and means for attaching said block to a stem,substantially as described.

13. A dop comprising ahead, means carried thereby for holding a stone tobe polished, said head having a curved groove provided with beveled orinclined edges, a block located in said groove and having correspondingsides, means for detachably securing said block to said head, and meansfor attaching said block to a stem, substantially as described.

1;. In a dop the combination of a head, means carried thereby forholding a stone to be polished, said head having a curved groove, theopposite sides of said groove being outwardly beveled, a block locatedin said groove and having sides corresponding to the sides of thegroove, a post extending from said block and provided with threads, anda nut adapted to work on said threads to draw the sides of the blockagainst the sides of the groove to lock the block to the head,substantially as described.

15. In a dop the combination of a head, means carried therebyfol-holding a stone to be polished, said head having a curved groove,the opposite sides of said groove being outwardly beveled, a blocklocated in said groove and having sides corresponding to the sides ofthe groove, a post extending from said block and provided with threads,a washer adapted to fit on over said post and to impinge against aidhead, and a nut to work on the threads of said post to clamp said blockto said head, substantially as described.

16. In a dop the combination of a head, means carried thereby forholding a stone to be polished, said head having a curved groove, theouter surface of said head at the sides of said groove beingcorrespondingly curved,the sides of said groove being beveled orunderout, a block located in said groove and having sides correspondingto the sides of the groove, said block having a post, a washer adaptedto fit over said post and having its inner surface curved to correspondto the curve of the head, and a nut adapted to work on the threads onsaid post to clamp said block to said head, substantially as described.

17. In a dop the combination of a head, means carried thereby forholding a stone to be polished, a block adj ustabl y connected with saidhead, a post extending from said block, a stem, and means for securingsaid stem to said post, substantially as described.

18. In a dop the combination of a head, means carried thereby forholding a stone to be polished, a block adjustably connected with saidhead, a post extending from said block, said post having a bore andprovided with one or more slits leading to said bore, a nut adapted tocompress the post around said bore, and a stem adapted to fit in saidbore, whereby said post may be clamped to said stem, substantially asdescribed.

19. A dop comprising a head, a pair ofjaws, means for moving them towardand from each other, and a jaw movable at an angle to the other jaws,and complemental locking devices between the head and said jaw toprevent back movement of the jaw from its position of adjustment,substantially as described.

20. Adop comprising a head, a pairof jaws, means for moving them towardand from each other, and a jaw movable at an angle to the other jaws,teeth carried by said head, and one or more projections or lugs carriedby the jaw to engage the teeth, substantially as described.

21. A dop comprising a head having bores extending at an angle to eachother, a pairof.

jaws guided in one bore to move toward and from each other, means foroperating said jaws, anotherjaw having a portion guided in the otherbore, and complemental locking devices between the head and said jaw toprevent back movement of the jaw from its position of adjustment,substantially as described.

22. A dop comprising a head having bores extending at an angle to eachother, a pairof jaws guided in one bore to move toward and from eachother, means for operating said jaws, another jaw havinga portion guidedin the other bore, and one or more projections or lugs carried by saidjaw to engage teeth carried by the head, to prevent back movement of thejaw from its position of adjustment, substantially as described.

A dop comprising a head having bores extending at an angle to eachother, a pair of jaws guided in one bore to move toward and from eachother, a right and left threaded screw in said bore to operate saidjaws, another jaw having a portion guided in the other groove,andcomplemental locking devices be- IIS tween the head and'said jaw toprevent back movement of the jaw from its position of adj ustment,substantially as described.

24. A dop comprising a head having bores extending at an angle to eachother, a pair of jaws guided in one bore to move toward and from eachother, a right and left threaded screw in said bore to operate saidjaws, an other jaw having a portion guided in the other

